Technology Questions

Q:

I don't want my class to be inherited by any other class. What should i do?

Answer

You should declared your class as final. But you can't define your class as final, if it is an abstract class. A class declared as final can't be extended by any other class.

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Subject: Java

2 6123
Q:

What is mean by "this" keyword in javascript?

A) It refers current object B) It referes previous object
C) It is variable which contains value D) None of the above
 
Answer & Explanation Answer: A) It refers current object

Explanation:
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Filed Under: Web Technology

0 6092
Q:

Which operator is used in catch-all handler?

A) ellipses operator B) ternary operator
C) string operator D) unary operator
 
Answer & Explanation Answer: A) ellipses operator

Explanation:

The ellipses operator can be represented as (…).

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Filed Under: C++

0 5988
Q:

The Internet was launched in 1969 and was originally called ?

A) AARPNET B) CERNET
C) ARPANET D) CERN
 
Answer & Explanation Answer: C) ARPANET

Explanation:

The Internet was originally called Advanced Research Project Agency Network (ARPANET).

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Filed Under: Web Technology
Job Role: Analyst

2 5970
Q:

Which of the following is not a correct variable type?

A) real B) char
C) float D) double
 
Answer & Explanation Answer: A) real

Explanation:

A variable provides us with named storage that our programs can manipulate. Each variable in C++ has a specific type, which determines the size and layout of the variable's memory the range of values that can be stored within that memory and the set of operations that can be applied to the variable.

The name of a variable can be composed of letters, digits, and the underscore character. It must begin with either a letter or an underscore. Upper and lowercase letters are distinct because C++ is case-sensitive −

 

Basic types of variables:


1. bool

Stores either value true or false.

2. char

Typically a single octet (one byte). This is an integer type.

3. int

The most natural size of an integer for the machine.

4. float

A single-precision floating point value.

5. double

A double-precision floating point value.

6. void

Represents the absence of type.

7. wchar_t

A wide character type.

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10 5923
Q:

Explain the function of Transmission Control Block

Answer

A TCB is a complex data structure that contains a considerable amount of information about each connection

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1 5904
Q:

What is Oracle Spatial?

Answer

Oracle Spatial, often referred to as spatial, provides a SQL schema and functions that facilitate the storage, retrieval, update, and query of collections of spatial features in an Oracle database. Oracle Spatial is designed to make spatial data management easier and more natural to users of location-enabled applications and geographic information system (GIS) applications. Once spatial data is stored in an Oracle database, it can be easily manipulated, retrieved, and related to all other data stored in the database.

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Subject: Oracle

1 5828
Q:

In an AVL tree the balancing is to be done when the pivotal value is in range of

A) greater than 1 and less than -1 B) greater than -1 and less than 1
C) greater than 1 D) less than -1
 
Answer & Explanation Answer: A) greater than 1 and less than -1

Explanation:

Difference between the heights of left and Right subtrees in an AVL tree can never be greater than +1

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Filed Under: C++

0 5825