Question 1

Expressions are the fundamental means of specifying computations in a programming language. Which of the following is a primary role of expressions in imperative languages?

Accepted Answer

Assignment

Answer

Data Retrieval

Answer

Data Storage

Answer

Data Transmission

Question 2

Which operator has the highest precedence in most programming languages?

Accepted Answer

Parentheses

Answer

Unary operators

Answer

Multiplication (*)

Answer

Addition (+)

Question 3

In C-based languages, which of the following is an example of a conditional expression?

Accepted Answer

average = (count == 0) ? 0 : sum / count;

Answer

a = b + c;

Answer

if (a > b) a = b;

Answer

while (a < b) a++;

Question 4

Which of the following is a solution to the problem of functional side effects?

Accepted Answer

Disallowing two-way parameters in functions

Answer

Using dynamic type checking

Answer

Allowing non-local references in functions

Answer

Encouraging implicit type conversions

Question 5

A program has the property of referential transparency if:

Accepted Answer

Any two expressions with the same value can be substituted for one another without affecting the program

Answer

It uses explicit type conversions

Answer

Functions do not change global variables

Answer

It does not use any functions

Question 6

Which of the following languages does NOT allow user-defined overloaded operators?

Accepted Answer

Java

Answer

Ada

Answer

C++

Answer

Ruby

Question 7

Which of the following is a widening conversion?

Accepted Answer

short to long

Answer

int to byte

Answer

double to float

Answer

float to int

Question 8

In most programming languages, how are mixed-mode expressions typically handled?

Accepted Answer

Using implicit type conversion (coercion)

Answer

Using narrowing conversions

Answer

Disallowing such expressions

Answer

Using explicit type conversion

Question 9

Which Boolean operator/s has equal precedence in some language?

Accepted Answer

AND (&&) / OR (||)

Answer

NOT (!)

Answer

OR (||) / XOR (^)

Answer

XOR (^)

Question 10

Which of the following statements about short-circuit evaluation is true?

Accepted Answer

C, C++, and Java use short-circuit evaluation for the usual Boolean operators

Answer

Short-circuit evaluation is more efficient than non-short-circuit evaluation

Answer

All languages use short-circuit evaluation for Boolean operators

Answer

Short-circuit evaluation always evaluates all operands

Question 11

Which language uses := as the assignment operator?

Accepted Answer

Pascal

Answer

FORTRAN

Answer

BASIC

Answer

C++

Question 12

What is the shorthand syntax for adding two values in most modern programming languages?

Accepted Answer

a += b

Answer

a = a // b

Answer

a =+ b

Answer

a == b

Question 13

Which of the following languages allows the assignment statement to produce a result and be used as an operand?

Accepted Answer

C

Answer

ALGOL

Answer

Pascal

Answer

FORTRAN

Question 14

In which language can you use the syntax ($first, $second) = ($second, $first); for multiple-target, multiple-source assignments?

Accepted Answer

Ruby

Answer

Java

Answer

Python

Answer

C++

Question 15

Which of the following statements is true about mixed-mode assignments in Java?

Accepted Answer

Java only allows widening assignment coercions

Answer

Java uses implicit type conversion for all numeric types

Answer

Java disallows all mixed-mode assignments

Answer

Java uses both widening and narrowing coercions

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