Who is one is not unary operation in relational algebra?

A Select
B Project
C Union
D Rename

Correct Answer: Union

Procedural query language - 4 Relational algebra ব্যবহৃত হয়। এটি বিভিন্ন ভাগে ভাগ করা যায়।
Bissoy MCQ
#তথ্য প্রযুক্তি #Combined Bank (সমন্বিত ব্যাংক) #বুলিয়ান অ্যালজেবরা এবং ডিজিটাল ডিভাইস #সোনালী ও জনতা ব্যাংক - অফিসার(আইটি) - 02.10.2021

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Sohana's mathematics test had 75 problems i.e. 10 arithmetic, 30 algebra and 35 geometry problems each carrying I mark She answered 70% of the arithmetic, 40% of the algebra and 60% of the geometry problems correctly. She did not pass the test as she got less than 60% marks. How many more questions she would have needed to answer correctly to earn a 60% passing grade?
A 5
B 10
C 15
D 20
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A IDMS
B Oracle
C dBase-II
D R:base
In boolean algebra, the overbar stands for the NOT operation, the plus sign stands for the _____ operation.
A AND
B OR
C NAND
D NOR
E None of the above
In boolean algebra, the times sign stands for the _____ operation
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A One relation is created.
B Two relations are created.
C Three relations are created.
D Four relations are created.
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A True
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A 2x+5(x-1)=9, x=2
B p-3 (p-5)= 10, p=2.5
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A De Morgan
B Standard
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D Karnaugh
E None of the above
বুলিয়ান বীজগণিতে A + A.B -এর সমতুল্য কোনটি? (Which one is equivalent to A + A.B in Boolean algebra?)
A A
B B
C A.B
D A+B
Not until a student has mastered algebra —the principles of geometry, trigonometry and physics
A he can begin to understand
B can be begin to understand
C he begins to understand
D begins to understand

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