Technology Questions

Q:

Explain how to lock and unlock a user account in Oracle.

Answer

SQL> ALTER USER user_name ACCOUNT LOCK;


SQL> ALTER USER user_name ACCOUNT UNLOCK;

Report Error

View answer Workspace Report Error Discuss

Subject: Oracle

0 3240
Q:

EXPLAIN has output with MATCHCOLS = 0. What does it mean?

Answer

a nonmatching index scan if ACCESSTYPE = 1


 

Report Error

View answer Workspace Report Error Discuss

0 3240
Q:

What’s the special meaning of __sleep and __wakeup?

Answer __sleep returns the array of all the variables than need to be saved, while __wakeup retrieves them.
Report Error

View answer Workspace Report Error Discuss

Subject: PHP

0 3231
Q:

What is C++

Answer

C++ is created by Bjarne Stroustrup of AT&T Bell Labs as an extension of C, C++ is an object-oriented computer language used in the development of enterprise and commercial applications. Microsoft’s Visual C++ became the premier language of choice among developers and programmers.

Report Error

View answer Workspace Report Error Discuss

Subject: C++

0 3230
Q:

What is Data Mart?

Answer

Data Mart is a data repository which is served to a community of people who works on knowledge (also known as knowledge workers). The data resource can be from enterprise resources or from a data warehouse.

Report Error

View answer Workspace Report Error Discuss

0 3228
Q:

What Is Requirement Traceability Matrix ?

Answer

Requirements tracing, a process of documenting the links between the requirements and the work products developed to implement and verify those requirements. Requirement Traceability Matrix (RTM) is a document which records the mapping between the high-level requirements and the test cases in the form of a table. The RTM captures all requirements and their traceability in a single document delivered at the conclusion of the life cycle. 


That’s how it ensures that the Test Plan covers all the requirements and links to their latest version.

Report Error

View answer Workspace Report Error Discuss

Subject: QA Testing

2 3228
Q:

What are the operators available in dynamic memory allocation?

A) new B) delete
C) compare D) both a & b
 
Answer & Explanation Answer: D) both a & b

Explanation:

new and delete operators are mainly used to allocate and deallocate
during runtime.

Report Error

View Answer Report Error Discuss

Filed Under: C++

1 3224
Q:

What do you mean by late binding?

Answer

Late binding refers to function calls that are not resolved until run time. Virtual functions are used to achieve late binding. When access is via a base pointer or reference, the virtual function actually called is determined by the type of object pointed to by the pointer.

Report Error

View answer Workspace Report Error Discuss

Subject: C++

0 3219