First year university Computer Science quiz on C++

A MIXED BAG OF QUESTIONS

----- is a combination of operators and operands that ----- An expression is;
that expresses a value.

----- is a group of (zero or more) statements delimited by a set of braces, { }. A compound statement (= a block).

----- is a sequence of data that comes from a particular source and is available and waiting to be moved to a particular destination. A stream. For the cin stream, it waits in the buffer

"Using functions as parameters" means ----- you replace an argument with a function call that returns a value of the same data type.

(Arguments/Parameters) appear in the function call whereas (arguments/parameters) are the position-matched variables in the function and appear in the function's declaration and function header. A function's value parameters are used to receive data supplied by ----- Arguments;
parameters;

the calling statement.

* indicates a ----- pointer.

A ----- is a program statement or expression that transfers control to a function so that it will perform its subtask. function call.

A ----- is a variable that contains the address of a memory location as its value. pointer.

A caret looks like ---- (

address-of operator looks like ----- &

Alphabetise:
How to sort 3 variables into order?
void main ()
{ string w1, w2, w3;

   … // user inputs 3 words

   if (w1>w2) swap(w1, w2); // see Swap, below

   if (w1>w3) swap(w1, w3);

   if (w2>w3) swap(w2, w3); then cout… }

An absolute number is ----- The numerical value of a real number without regard to its sign. Eg, the absolute value of -4 is 4.

Arguments that are used for both input and output are passed by ----- reference.

Array memory cells can called which 3 names? Components, elements, cells.

Array_name[3] is read out (ie, spoken) as ------ array name sub (or subscript) 3.

Arrays can be depicted (horizontally / vertically). Both.

Arrays cannot be passed by value. Right/wrong? Right. They're either passed by reference or by const reference.

Arrays: Write code to add 2 arrays element by element, and store the result in a corresponding element in array3. void add_arrays (int size, const float a[], const float b[], float c[])
…

{ int i;

for (i=0; i < size; i++)

   { c[i] = a[i] + b[i]; }

return; }

Assigning a float to an integer causes ----- the output to be truncated.

Associativity: Which is processed first? Left before right.

C++ defines string type in which header file? string (now that wasn’t hard, was it?)

cin >> removes the trailing newline character from its stream. Right? Wrong.

Columns: In what column will the E of AGE be output? name is a string, age is an int.
cout<<"NAME"<<"AGE"<o:p>

cout<<span style="font-family:Symbol">-name.length())<<< endl;
E will be in column 16 because NAME uses 4 spaces, then setw(12) creates a zone of width 12. The right edge of this zone is in column 16 because 4 + 12 = 16.

Comparing arrays: Impress us with your skill. Write a code fragment to show us how it's done.

[ Note: I think the word processing software I was using has mangled some of this code, so follow Srikar's emailed advice. And if you see other errors, do please let me know. Thanks Srikar. ]
int compare_arrays (int size, const float a{}, const float b[])
{ int i = 0; // loop control variable and array subscript

while ( (io:p>

   i++; // why??

return (a[i] == b[i] ); }

...............................................................

Srikar Surendra says it should be:

int compare_arrays (int size, const float a[], const float b[])

{

int i = 0; // loop control variable and array subscript

while(i < size)

{

i++;

if (a[i] != b[i] ) return 0; //comparison failed, The arrays are different

}

return 1; //comparison passed, The arrays are the same.

}

cout is (an object / a function). object.

Declare the datatype for the value returned by a function at the place where ----- you name the function to be defined. (Later you copy this up into the prototypes section.)

Declare the datatype of each parameter in each function at the place where ----- you introduce the parameter.

do {statement;} % while (expression) %
What replaces the % signs?
Nothing, then a semicolon.

Does the scope of a variable called in main include the bodies of functions called by main? No. A variable declared inside main has its scope limited to the body of main.

Expressions take {} and statements take (). True? Nope. (Hint: It's the other way around.)

Fill an array of 4 numbers interactively, using a for loop, then output it all showing which element each number was found in. cout<< "Enter 4 values: ";
for (i=0; i < 4; i++)

   cin>> my_array[i];

for (i=0; i < 4; i++)

cout<< "my_array[" <<<"] = " <o:p>

for (initiation_exp; stop_condn; update_exp) & statement &
What replaces the & signs?

Nothing, then a semicolon.

Fractions:
How to divide 1 fraction into another?
Invert one fraction and multiply.

Fractions:
How to return the next whole number up?
Use ceil (in the math.h library).

Functional programming languages rely heavily on recursion where procedural languages use ---- iteration.

Home |

----- is a combination of operators and operands that -----	An expression is; that expresses a value.
----- is a group of (zero or more) statements delimited by a set of braces, { }.	A compound statement (= a block).
----- is a sequence of data that comes from a particular source and is available and waiting to be moved to a particular destination.	A stream. For the cin stream, it waits in the buffer
"Using functions as parameters" means -----	you replace an argument with a function call that returns a value of the same data type.
(Arguments/Parameters) appear in the function call whereas (arguments/parameters) are the position-matched variables in the function and appear in the function's declaration and function header. A function's value parameters are used to receive data supplied by -----	Arguments; parameters; the calling statement.
* indicates a -----	pointer.
A ----- is a program statement or expression that transfers control to a function so that it will perform its subtask.	function call.
A ----- is a variable that contains the address of a memory location as its value.	pointer.
A caret looks like ----	(
address-of operator looks like -----	&
Alphabetise: How to sort 3 variables into order?	void main () { string w1, w2, w3; … // user inputs 3 words if (w1>w2) swap(w1, w2); // see Swap, below if (w1>w3) swap(w1, w3); if (w2>w3) swap(w2, w3); then cout… }
An absolute number is -----	The numerical value of a real number without regard to its sign. Eg, the absolute value of -4 is 4.
Arguments that are used for both input and output are passed by -----	reference.
Array memory cells can called which 3 names?	Components, elements, cells.
Array_name[3] is read out (ie, spoken) as ------	array name sub (or subscript) 3.
Arrays can be depicted (horizontally / vertically).	Both.
Arrays cannot be passed by value. Right/wrong?	Right. They're either passed by reference or by const reference.
Arrays: Write code to add 2 arrays element by element, and store the result in a corresponding element in array3.	void add_arrays (int size, const float a[], const float b[], float c[]) … { int i; for (i=0; i < size; i++) { c[i] = a[i] + b[i]; } return; }
Assigning a float to an integer causes -----	the output to be truncated.
Associativity: Which is processed first?	Left before right.
C++ defines string type in which header file?	string (now that wasn’t hard, was it?)
cin >> removes the trailing newline character from its stream. Right?	Wrong.
Columns: In what column will the E of AGE be output? name is a string, age is an int. cout<<"NAME"<<"AGE"<o:p> cout<<span style="font-family:Symbol">-name.length())<<< endl;	E will be in column 16 because NAME uses 4 spaces, then setw(12) creates a zone of width 12. The right edge of this zone is in column 16 because 4 + 12 = 16.
Comparing arrays: Impress us with your skill. Write a code fragment to show us how it's done. [ Note: I think the word processing software I was using has mangled some of this code, so follow Srikar's emailed advice. And if you see other errors, do please let me know. Thanks Srikar. ]	int compare_arrays (int size, const float a{}, const float b[]) { int i = 0; // loop control variable and array subscript while ( (io:p> i++; // why?? return (a[i] == b[i] ); } ............................................................... Srikar Surendra says it should be: int compare_arrays (int size, const float a[], const float b[]) { int i = 0; // loop control variable and array subscript while(i < size) { i++; if (a[i] != b[i] ) return 0; //comparison failed, The arrays are different } return 1; //comparison passed, The arrays are the same. }
cout is (an object / a function).	object.
Declare the datatype for the value returned by a function at the place where -----	you name the function to be defined. (Later you copy this up into the prototypes section.)
Declare the datatype of each parameter in each function at the place where -----	you introduce the parameter.
do {statement;} % while (expression) % What replaces the % signs?	Nothing, then a semicolon.
Does the scope of a variable called in main include the bodies of functions called by main?	No. A variable declared inside main has its scope limited to the body of main.
Expressions take {} and statements take (). True?	Nope. (Hint: It's the other way around.)
Fill an array of 4 numbers interactively, using a for loop, then output it all showing which element each number was found in.	cout<< "Enter 4 values: "; for (i=0; i < 4; i++) cin>> my_array[i]; for (i=0; i < 4; i++) cout<< "my_array[" <<<"] = " <o:p>
for (initiation_exp; stop_condn; update_exp) & statement & What replaces the & signs?	Nothing, then a semicolon.
Fractions: How to divide 1 fraction into another?	Invert one fraction and multiply.
Fractions: How to return the next whole number up?	Use ceil (in the math.h library).
Functional programming languages rely heavily on recursion where procedural languages use ----	iteration.

A MIXED BAG OF QUESTIONS