Tag: programming languages

Questions Related to programming languages

SQL was developed by

technology programming languages

  1. Donald D. Chamberlin and Raymond F. Boyce

  2. Donald D. Chamberlin

  3. Raymond F. Boyce

  4. none

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Correct Option: A

Why we use "Type Def" in C ?
technology programming languages

  1. Modifying existing Data type.

  2. Used for defining type of data type used.

  3. Creating new data type names

  4. Not a valid key word

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Correct Option: A

"typedefs" used for data types are not machine dependent.

technology programming languages

  1. True

  2. False

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Correct Option: B

"typedefs" used for data types are not machine dependent.
technology programming languages

  1. True

  2. False

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Correct Option: B

Consider the following code: int x, y, z; y = 1; z = 5; x = 0 - (++y) + z++; After execution of this, what will be the values of x, y and z?
technology programming languages

  1. x = 4, y = 1, z = 5

  2. x = 3, y = 2, z = 6

  3. x = -7, y = 1, z = 5

  4. x = 4, y = 2, z = 6

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Correct Option: B
Explanation:

To solve this question, the user needs to know the order of operations in C programming and the difference between pre-increment and post-increment operators.

First, let's break down the expression x = 0 - (++y) + z++:

  1. ++y is a pre-increment operator, which means it increments the value of y by 1 before the value is used in the expression. So, y becomes 2.
  2. z++ is a post-increment operator, which means it increments the value of z by 1 after the value is used in the expression. So, z remains 5 in this expression.
  3. The expression inside the parentheses is evaluated first, so ++y is evaluated to 2.
  4. Next, the multiplication and division are evaluated from left to right, but there are none in this expression.
  5. Finally, the addition and subtraction are evaluated from left to right.

So, 0 - (++y) evaluates to -2 and z++ evaluates to 5, therefore the whole expression evaluates to -2 + 5 = 3.

Therefore, the correct answer is:

The Answer is: B. x = 3, y = 2, z = 6

In the code below, what data types the variable x can have? byte b1 = 5; byte b2 = 10; x = b1 * b2;(A) byte (B) int (C) short (D) long (E) float (F) double
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  1. (A), (B), (D) & (E)

  2. (B), (C) & (D)

  3. (B), (D), (E) & (F)

  4. (B), (D) & (E)

  5. (D) & (F)

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Correct Option: C

Given the declarations boolean b; short x1 = 100, x2 = 200, x3 = 300; Which of the following statements are evaluated to true? (A) b = x1 * 2 == x2; (B) b = x1 + x2 != 3 * x1; (C) b = (x3 - 2*x2<0) || ((x3 = 400)<2**x2); (D) b = (x3 - 2*x2>0) || ((x3 = 400) 2*x2);
technology programming languages

  1. (A), (B) & (C)

  2. (A), (C) & (D)

  3. (B) & (C)

  4. (A) & (C)

  5. (A) & (D)

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Correct Option: D

Which of the following represent legal flow control statements? (A) break; (B) break(); (C) continue outer; (D) continue(inner); (E) return; (F) exit();
technology programming languages

  1. (A), (B) & (C)

  2. (A), (C) & (E)

  3. (A), (C) & (D)

  4. (A) & (E)

  5. (C) & (E)

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Correct Option: B
Explanation:

To answer this question, the user needs to have a basic understanding of flow control statements in programming. Flow control statements are used to control the order in which statements are executed in a program. They can be used to make decisions, loop over sets of instructions, and interrupt the normal flow of execution.

Now, let's go through each option and explain why it is right or wrong:

A. (A), (B) & (C): Option A is incorrect because (B) break(); is not a valid flow control statement. (A) break; is a legal statement that is used to terminate a loop or switch statement. (C) continue outer; is also a legal statement that is used to skip to the next iteration of an outer loop. Therefore, option A is incorrect.

B. (A), (C) & (E): Option B is correct. (A) break; is a legal statement that is used to terminate a loop or switch statement. (C) continue outer; is also a legal statement that is used to skip to the next iteration of an outer loop. (E) return; is a legal statement that is used to exit a function and return a value. Therefore, option B is the correct answer.

C. (A), (C) & (D): Option C is incorrect because (D) continue(inner); is not a valid flow control statement. (A) break; is a legal statement that is used to terminate a loop or switch statement. (C) continue outer; is also a legal statement that is used to skip to the next iteration of an outer loop. Therefore, option C is incorrect.

D. (A) & (E): Option D is incorrect because (E) exit(); is not a valid flow control statement. (A) break; is a legal statement that is used to terminate a loop or switch statement. (E) return; is also a legal statement that is used to exit a function and return a value. Therefore, option D is incorrect.

E. (C) & (E): Option E is incorrect because it is missing a legal statement. (C) continue outer; is a legal statement that is used to skip to the next iteration of an outer loop. (E) return; is also a legal statement that is used to exit a function and return a value. Therefore, option E is incorrect.

The Answer is: B. (A), (C) & (E)

Given: • d is a valid, non-null Date object • df is a valid, non-null DateFormat object set to the current locale What outputs the current locales country name and the appropriate version of d’s date?
technology programming languages

  1. Locale loc = Locale.getLocale();System.out.println(loc.getDisplayCountry()+ “ “+ df.format(d));

  2. Locale loc = Locale.getDefault();System.out.println(loc.getDisplayCountry()+ “ “ + df.format(d));

  3. Locale bc = Locale.getLocale();System.out.println(loc.getDisplayCountry()+ “ “+ df.setDateFormat(d));

  4. Locale loc = Locale.getDefault();System.out.println(loc.getDispbayCountry()+ “ “+ df.setDateFormat(d));

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Correct Option: B

What is an Iterator ?
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  1. Enables you to cycle through a collection in the forward direction only, for obtaining or removing elements

  2. just for loop

  3. while loop

  4. It is an class for storing objects

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Correct Option: A