| 2481 |
The UN target for official development assistance by rich countries is: |
Environmental Studies
International aid |
Medium |
| 2482 |
A loan from the World Bank funded by contributions from many countries is an example of: |
Environmental Studies
International aid |
Easy |
| 2483 |
A country receives a grant to build a power plant on the condition that turbines are bought from the donor, t… |
Environmental Studies
International aid |
Medium |
| 2484 |
Which institution serves as a financial mechanism for global environmental conventions such as those on biodi… |
Environmental Studies
International aid |
Hard |
| 2485 |
In which situation does the problem of data inconsistency arise? |
Computer Science/Informatics Practices
Database and file systems |
Easy |
| 2486 |
What is a database schema? |
Computer Science/Informatics Practices
Database and file systems |
Easy |
| 2487 |
A school stores a student's phone number in the fee file, library file and transport file. Which limitation o… |
Computer Science/Informatics Practices
Database and file systems |
Medium |
| 2488 |
In a file system, adding a new field to a file forces changes in every program that reads it. This limitation… |
Computer Science/Informatics Practices
Database and file systems |
Medium |
| 2489 |
Which statement about a DBMS is correct? |
Computer Science/Informatics Practices
Database and file systems |
Hard |
| 2490 |
A relation STUDENT has 5 attributes and 32 tuples. What is its degree? |
Computer Science/Informatics Practices
Relational data model |
Easy |
| 2491 |
In the relational model, a single row of a relation is called a |
Computer Science/Informatics Practices
Relational data model |
Easy |
| 2492 |
The set of all permissible values that an attribute can take is called its |
Computer Science/Informatics Practices
Relational data model |
Medium |
| 2493 |
A table has degree 4 and cardinality 10. Three new rows are inserted and one column is dropped. What are the … |
Computer Science/Informatics Practices
Relational data model |
Medium |
| 2494 |
Which of the following is NOT a property of a relation in the relational model? |
Computer Science/Informatics Practices
Relational data model |
Hard |
| 2495 |
A relation has three candidate keys. How many alternate keys does it have once a primary key is chosen? |
Computer Science/Informatics Practices
Keys |
Easy |
| 2496 |
Which constraint must a primary key always satisfy? |
Computer Science/Informatics Practices
Keys |
Easy |
| 2497 |
In tables EMP(EmpNo, Name, DeptNo) and DEPT(DeptNo, DName), DeptNo in EMP is best described as |
Computer Science/Informatics Practices
Keys |
Medium |
| 2498 |
In a SECTION table, RollNo repeats across classes, but each combination of Class and RollNo is unique. What i… |
Computer Science/Informatics Practices
Keys |
Medium |
| 2499 |
A row is inserted into ORDERS with CustID = 'C9', but no customer with ID 'C9' exists in CUSTOMER, where Cust… |
Computer Science/Informatics Practices
Keys |
Hard |
| 2500 |
Which relational algebra operation extracts only certain columns of a relation? |
Computer Science/Informatics Practices
Relational algebra |
Easy |