Programming Skills – NAT

Programming Skills - NAT (National Aptitude Test)

Programming Skills refers to the Computer Science portion of the National Aptitude Test (NAT), a standardised test for admissions in Pakistan.

1 / 50

What does the `++` operator do?

Increases the value of a variable by 1.

Adds 2 to a variable.

Compares two values for equality.

Multiplies a variable by itself.

2 / 50

A function is defined as `int calculate(int a, int b)`. What does the `int` before `calculate` signify?

The function takes integer inputs.

The function returns an integer value.

The function has internal integer variables.

The function name is an integer.

3 / 50

How many times will the body of this loop execute? `for(int i=5; i>0; i--) { }`

4 times

5 times

Infinite times

6 times

4 / 50

In an array, all elements must be of the same?

Size

Index

Value

Data Type

5 / 50

What is the term for a variable that is declared inside a function?

Global Variable

Local Variable

External Variable

Constant Variable

6 / 50

What is the role of a compiler?

To translate high-level code into machine code all at once.

To execute the program line by line.

To find and fix logical errors in the code.

To design the user interface for the program.

7 / 50

What is the main purpose of an algorithm?

To declare variables.

To draw a flowchart.

To write code in a specific programming language.

To provide a step-by-step procedure for solving a problem.

8 / 50

What is the primary purpose of a variable in programming?

To create loops

To perform mathematical calculations

To define functions

To store and manipulate data

9 / 50

Which data type is most suitable for storing a single character like 'A'?

int

char

float

string

10 / 50

What is the value of `result`? `int result = (10 == 10);`

True

11 / 50

What is the primary goal of a sorting algorithm?

To arrange the elements of a list in a specific order (ascending/descending).

To combine two lists into one.

To reduce the memory used by an array.

To search for an element in a list.

12 / 50

Which keyword is used to define a constant value that cannot be changed?

static

const or final

variable

fixed

13 / 50

In a `do-while` loop, the condition is checked?

In the middle of the loop.

At the end of the loop.

It is not checked at all.

At the beginning of the loop.

14 / 50

What is the value of `arr[2]` after the code `int arr[] = {10, 20, 30, 40};` is executed?

15 / 50

Which of the following is a key step in the Linear Search algorithm?

Repeatedly swap adjacent elements.

Check each element in the list one by one.

Compare the target value with the middle element.

Divide the list into smaller sub-lists.

16 / 50

Which of the following is the correct way to write an assignment statement?

x == 5;

x : 5;

x -> 5;

x = 5;

17 / 50

In programming, a sequence of characters is called a?

Word

Character

Text

String

18 / 50

The process of combining two strings is called?

Linking

Adding

Merging

Concatenation

19 / 50

If `a` is 10 and `b` is 3, what is the value of `a % b`?

20 / 50

In a flowchart, what shape is used to represent a decision?

Parallelogram

Rectangle

Diamond

Oval

21 / 50

What is the purpose of an `if` statement?

To define a function.

To make a decision based on a condition.

To declare a variable.

To repeat a block of code.

22 / 50

What will this loop print? `for(int i=0; i<3; i++) { printf("%d ", i); }`

1 2 3

0 1 2 3

0 1 2

1 2

23 / 50

Which of the following is a syntactically correct variable name?

total_score

my variable

int

1stNumber

24 / 50

What is the result of the expression `15 / 4` in integer division?

25 / 50

The expression `!(5 > 3)` evaluates to:

False

True

26 / 50

Which of the following is a logical operator?

27 / 50

What is the purpose of the `else` part in an `if-else` statement?

To terminate the program.

To execute code only if the if condition is true.

To check another condition.

To execute code only if the if condition is false.

28 / 50

In a `switch` statement, which keyword is used to terminate a case?

stop

break

end

exit

29 / 50

What is the purpose of comments in source code?

To explain the code and make it more readable for programmers.

To instruct the compiler to ignore syntax errors.

To increase the execution speed of the program.

To declare constants.

30 / 50

What is the primary characteristic of the Bubble Sort algorithm?

It divides the array into halves.

It uses a pivot element to partition the array.

It swaps adjacent elements if they are in the wrong order.

It selects the minimum element and swaps it with the first.

31 / 50

Which protocol is primarily used for securely transferring web pages over the internet?

HTTP

FTP

SMTP

HTTPS

32 / 50

Which of the following best describes an algorithm?

A type of computer hardware

A set of rules to solve a problem in a finite number of steps

The final output of a program

A programming language

33 / 50

Which symbol is commonly used in pseudocode to represent an output operation?

OUTPUT or PRINT

SET

INPUT

34 / 50

What does the following code do? `while(condition) { // code }`

Executes the code a fixed number of times.

Executes the code exactly once.

Executes the code only if the condition is false.

Repeatedly executes the code as long as the condition is true

35 / 50

What is the final value of `x` after this code executes? `int x = 5; x = x + 2;`

36 / 50

Which loop is best used when the number of iterations is unknown beforehand?

while loop

for loop

Both B and C

do-while loop

37 / 50

Which control structure is used to execute a block of code a specific number of times?

switch statement

if-else statement

for loop

while loop

38 / 50

Which of these is a Boolean data type?

Can hold values like true and false.

Can hold decimal numbers.

Can hold a single character.

Can hold whole numbers.

39 / 50

In pseudocode, the statement `SET count = 0` is equivalent to?

while count < 0

input count

count = 0; in a programming language.

if count == 0

40 / 50

A flowchart symbol shaped as a parallelogram typically represents:

A decision

The start or end

An input/output operation

A process

41 / 50

Which searching algorithm requires the list to be sorted for it to work?

Binary Search

Bubble Search

Sequential Search

Linear Search

42 / 50

In an array `int scores[5];`, what is the index of the first element?

43 / 50

Which of the following is a valid function call for a function defined as `void display()`?

display();

int x = display();

display;

void display();

44 / 50

The process of finding and fixing errors in a program is called?

Debugging

Interpreting

Executing

Compiling

45 / 50

The `printf` function in C is used for?

Defining a new function

Getting input from the user

Performing calculations.

Displaying output on the screen.

46 / 50

Which data type is used to store decimal numbers like 3.14?

double or float

bool

int

char

47 / 50

Which part of a function is known as its signature?

The return statement

The comment above the function

The function's name and its parameter list

The code inside the curly braces {}

48 / 50

**Which operator has the highest precedence in the expression `5 + 3 * 2`?**

() (Parentheses)

+ (Addition)

* (Multiplication)

= (Assignment)

49 / 50

Which of the following is a comparison operator?

50 / 50

What is the main advantage of using a function in a program?

It automatically fixes logical errors.

It makes the program run faster.

It increases the memory usage.

It reduces code redundancy and improves reusability.

Your score is

The average score is 62%

What does the ++ operator do?

A function is defined as int calculate(int a, int b). What does the int before calculate signify?

How many times will the body of this loop execute? for(int i=5; i>0; i--) { }